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12648 Sigma-Aldrich

Potassium nitrate

puriss., meets analytical specification of Ph Eur, BP, USP, FCC, E252, 99.0-100.5%

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Properties

Related Categories Chemical Synthesis, Essential Chemicals, Inorganic Salts, Potassium, Potassium Salts,
Quality Level   100
grade   puriss.
assay   99.0-100.5%
quality   meets analytical specification of Ph Eur, BP, USP, FCC, E252
impurities   acidity or alkalinity, complies
  reducing matter, complies
  residual solvents, complies
  ≤0.001% heavy metals (as Pb)
  ≤0.005% ammonium (NH4)
loss   ≤0.5% loss on drying, 105 °C
pH   5-8 (20 °C, 5%)
mp   334 °C (lit.)
anion traces   chloride (Cl-): ≤10 mg/kg
  nitrite (NO2-): ≤5 mg/kg
  sulfate (SO42-): ≤100 mg/kg
cation traces   As: ≤1 mg/kg
  Ca: ≤50 mg/kg
  Cu: ≤10 mg/kg
  Fe: ≤10 mg/kg
  Na: ≤1000 mg/kg
  Pb: ≤4 mg/kg
  Zn: ≤10 mg/kg
suitability   complies for appearance of solution
SMILES string   [K+].[O-][N+]([O-])=O
InChI   1S/K.NO3/c;2-1(3)4/q+1;-1
InChI key   FGIUAXJPYTZDNR-UHFFFAOYSA-N

Description

General description

Potassium nitrate is colorless potassium salt having rhombic crystals. It is an oxidizing agent. In nature it is found as saltpeter. It can be prepared by reacting potassium carbonate/ hydroxide with nitric acid or by the reaction of sodium nitrate with potassium chloride.1 It can be prepared by combining ammonium nitrate and potassium hydroxide under hot conditions.
Potassium nitrate can find applications as an oxidizer, which can be prepared by combining ammonium nitrate and potassium hydroxide under hot conditions.

Application

Potassium nitrate may be employed for the following studies:
• Preparation of gun powder, ceramics, glass, dyeing and printing.1
• As oxidizing agent in the fireworks.1
• Preparation of potassium nitrite.1
• As desensitizing agent for tooth hypersensitivity.
• As phase change material for the preparation of nanofluids with phase change behavior.

Safety & Documentation

Safety Information

Symbol 
GHS03  GHS03
Signal word 
Warning
Hazard statements 
Precautionary statements 
RIDADR 
UN 1486 5.1 / PGIII
WGK Germany 
WGK 1
RTECS 
TT3700000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Single- & multi-channel pipettes from BRAND
Protocols & Articles
Peer-Reviewed Papers
15

References

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